pH Indicator Paper, sometimes called Litmus Paper, or pH test strips, are used to test the pH of solutions.
80 strips per “book”.
Dip in solution and find the closest colour match to determine pH.
I have books with the following ranges, you choose which range you want…
I use these for testing my hydroponic nutrient solution pH levels, I imagine you might also test aquariums with them.
Note that the strip packaging is all in chinese. The 5.4 to 7.0 range papers have a “less than 5.4” and “greater than 7.0” colour indicators as well, see the image.
All of our products are shipped from Christchurch, New Zealand using CourierPost for NZ, and Airmail for international.
